Hi,
I'm new to the forum and this is my first post.
I'm trying to create an ebook that utilizes a list within a list (or a sublist, if you will)
for instance, i have an unordered list, and on one of those points, i have an ordered sublist. This seems to cause a problem when I try to validate the EPUB file with http://threepress.org/document/epub-validate

This is how I have structured it, as an example:
<ul>
<li></li>
<li></li>
<ol>
<li></li>
<li></li>
</ol>
<li></li>
</ul>